diff --git a/doc/apps.md b/doc/apps.md
index 7cc9b45a17e..7133ceb117a 100644
--- a/doc/apps.md
+++ b/doc/apps.md
@@ -36,7 +36,7 @@ $repositories = $client->api('apps')->listRepositories(456);
 
 ### List repositories for a given installation and user
 
-```
+```php
 $repositories = $client->api('current_user')->repositoriesByInstallation(456);
 ```